Copy Video Frame EN
igorlogius · Firefox
Capture the current picture of a video as an image. Copy it to the clipboard or look at it in a small window, from a right click, a keyboard shortcut or the toolbar button.
截图
简介
Capture the current picture of a video as an image. Copy it to the clipboard or look at it in a small window, from a right click, a keyboard shortcut or the toolbar button.
Quick start
- Hold Shift and right click a video. Holding Shift gets you the normal Firefox menu even on pages that show their own menu for the video.
- Choose "Copy Video Frame".
- The picture is captured, a short white flash and a shutter sound confirm it, and the image is ready:
- if you have allowed clipboard access, it is copied to the clipboard as an image, ready to paste
- otherwise it opens in a small window. Right click the image there to copy or save it.
Three ways to capture
- Right click menu: Shift and right click the video, then "Copy Video Frame". This works for videos in embedded frames too.
- Keyboard shortcut: press Alt+Shift+V to capture the video under the mouse. If the mouse is not over a video, the first video on the page is used. You can change the keys in the Add-ons Manager (Manage Extension Shortcuts).
- Toolbar button: click it to capture the first video that is visible in the tab. This is handy when you would rather not hover over the video.
The shortcut and the toolbar button only find videos in the page itself, not in embedded frames. Use the right click menu for videos inside frames.
If no video is found, a small window explains what went wrong.
Where the image goes
- Clipboard: needs the optional permission to put data into the clipboard. Allow it in the Add-ons Manager on the Permissions tab of this add-on. After that, every capture is copied as an image right away.
- Window: without the permission, the image opens in a small window that fits the video, up to 90 percent of your screen. The picture scales down to fit.
How the picture is taken
- Directly from the video: the default. The current frame is read from the video in its original size, so it is sharp. It works even if the video is scrolled out of view. Anything drawn on top of the video, such as subtitles or buttons of a custom player, is not part of the picture.
- Screenshot of the video: used automatically for protected (DRM) videos and other videos that do not allow reading their frames. The visible area of the video is captured from the screen, cropped to the video. Everything visible on top of it, including subtitles, is part of the picture. The video has to be on screen for this.
The controls of the video are hidden for a moment during the capture, so that they do not end up in the picture, and are brought back right after.
Options
The options page opens once after the installation and later from the add-on preferences. It has a "How to use" section and these settings, which are saved right away:
- Shutter sound: switch the sound on or off, test it, upload your own sound (MP3, WAV or OGG, up to 500 KB) or go back to the built-in sound.
- Always use screenshot capture: always use the screenshot method, even for ordinary videos. Use it to get subtitles and other overlays in your pictures. The video must be on screen.
Permissions and privacy
- menus: add "Copy Video Frame" to the right click menu of videos.
- activeTab: read the video in the tab you use the add-on on, and take the screenshot of the tab.
- storage: remember the sound and capture settings.
- clipboardWrite (optional): copy the image to the clipboard.
The add-on does not collect or transmit any data. The pictures stay on your computer.
Copy Video Frame 是做什么的
Copy Video Frame 是一款面向 Firefox 的开发者工具类扩展,主要用来调试页面、查看样式与请求、测试接口、辅助前端开发。官方对它的介绍是:Capture the current picture of a video as an image. Copy it to the clipboard or look at it in a small window, from a right click, a keyboard shortcut or the toolbar button.在Firefox 附加组件商店(AMO)上,它当前版本 1.1.21,评分 5(4 人评价),约 266 名用户。
适合什么人用
从功能定位看,Copy Video Frame 更适合前端工程师、测试与需要经常查看页面结构的用户。如果你平时只是偶尔遇到相关需求,用浏览器自带功能也能凑合;但如果这件事每天都发生,装一个专门处理它的扩展通常比手动操作省事得多。
怎么安装 Copy Video Frame
- 打开Firefox 附加组件商店(AMO)上的官方页面;
- 点「添加到浏览器」并确认权限提示;
- 装好后在扩展列表里固定图标,方便随时开关。
本站只做索引与介绍,安装包来自官方商店。如果商店页面提示当前地区不可用,说明该扩展未在你所在区域上架。
常见问题
Copy Video Frame 是免费的吗?
Copy Video Frame 在Firefox 附加组件商店(AMO)免费提供下载。它是浏览器扩展,装上就能直接用,不需要注册账号。
Copy Video Frame 安全吗?
它只申请了 0 项权限,范围比较克制,没有申请「读取所有网站数据」这种大权限。
Copy Video Frame 支持哪些浏览器?
当前收录的版本来自Firefox 附加组件商店(AMO),适用于 Firefox。同一个扩展在其他商店可能有对应版本,但功能与版本号不一定相同。
怎么卸载 Copy Video Frame?
在扩展管理页找到 Copy Video Frame,点移除即可。它在本地保存的设置会一起清掉,不会残留数据。
权限清单 来自 manifest.json 原文
接口权限 3
activeTabmenusstorage
接口权限(可选) 1
clipboardWrite
